I'm facing an issue where a button on my HTML page triggers a popup box to open (which covers the background). To prevent the background from scrolling, I am using the following CSS:
windowHeight = $(window).height();
$("body").css({
"height": windowHeight,
"overflow": "hidden",
"overflow-y": "hidden"
});
While everything is functioning correctly, the page automatically scrolls to the top when the button is clicked. How can I avoid this from happening?
The reason for this behavior is when you modify the height property. It's unnecessary to explicitly set the height; simply applying overflow: hidden to the body should suffice.
CSS:
.locked {
overflow-x: hidden;
overflow-y: hidden;
}
Javascript:
$("body").addClass("locked");
Give it a try: http://jsbin.com/tapagexope/1/edit?html,css,js,output (Click on the body)
Tested on FF 34 and Chrome 38 browsers.
Remember to place your overlay within a container that has position: fixed with all sides (left, top, bottom, right) set as 0, covering the entire viewport. Then you can center your overlay element inside that box.
Fortunately, I have already developed a custom jQuery solution for this specific issue: jquery-preventscroll
To implement the plugin, simply include the script and then utilize the following code when the modal is displayed:
$(window).preventscroll();
Once the modal is closed, you can re-enable scrolling functionality by executing:
$(window).preventscroll("undo");
If you'd like to see a demonstration, check out this example.
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